单项选择题

The oldest documented age for a redwood tree is approximately________.

A．350 years
B．400 years
C．800 years
D．2,000 years
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单项选择题
What is the cause of their complaint
A．The place.
B．The heat.
C．The workload.
D．The facilities.
单项选择题
The man shocked at the scene the next morning________.
A．because the bird had finally understood his threat
B．because the bird managed to escape from the chicken house
C．because the bird had learned to scream back at him
D．because the bird was living peacefully with the chickens
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